期刊
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
卷 71, 期 11, 页码 1730-1739出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjfas-2014-0072
关键词
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资金
- Ministere des Ressources naturelles et de la Faune du Quebec (MRNF)
- CGRSE
- NSERC (Natural Sciences and Engineering Research Council of Canada)
With the decline of many exploited fish populations, catch and release has become an increasingly used management practice to allow sport fishing while reducing its impact on wild populations. However, survival and reproductive success can vary according to the catch and release technique and environmental conditions, suggesting a potential impact of this practice on prespawning behaviour. Here we evaluate how some critical aspects of salmon freshwater migration are influenced by catch and release and by environmental factors. For this purpose, 40 multi-sea-winter Atlantic salmon (Salmo salar) (20 catch and release and 20 control) were followed by telemetry from June 2011 to March 2012. Temperature was found to influence movements and the daily probability that a fish would cross a fish ladder, while water discharge influenced daily distance travelled during the prespawning migration. Catch and release was found to influence the daily probability of fish to cross a barrier as well as the total distance traveled in the river. Overall, this study suggests that salmon caught and released by fishermen survive and reproduce, but that prespawning exploration behaviours could be altered compared with those of uncaught salmon.
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